小编Sun*_*rge的帖子

我已经升级了Xcode 8,但是当我调试时,每个对象都显示以下错误:

expression produced error: error: Couldn't materialize: couldn't get the value of __once: extracting data from value failed
error: errored out in DoExecute, couldn't PrepareToExecuteJITExpression

这似乎是系统级错误,所以我已经尝试了所有可能的解决方案,但仍然可以正常工作.

我的 M1 mac 上总是出现以下错误rvm install 2.6.7

me@xx ~ % rvm install 2.6.7
ruby-2.6.7 - #removing src/ruby-2.6.7 - please wait
Searching for binary rubies, this might take some time.
No binary rubies available for: osx/11.5/x86_64/ruby-2.6.7.
Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies.
Checking requirements for osx.
Certificates bundle '/opt/homebrew/etc/openssl@1.1/cert.pem' is already up to date.
Requirements installation successful.
Installing Ruby from source to: /Users/me/.rvm/rubies/ruby-2.6.7, this may take a while depending on your cpu(s)... …

今天我已经安装了Xcode 9并为iPhone x构建我的应用程序.但是上面和下面的区域显示为黑色,就像我们几年前为iPhone 5遇到的情景一样,当屏幕切换到3.5到4时.

我们如何才能解决这个问题？

据我所知,我知道我们使用-fno-objc-arcflag为ARC项目中不支持ARC的文件禁用ARC.

此外,我们还可以使用-fobjc-arcflag来启用ARC,以便在非ARC项目中支持ARC文件.

但是,如果我想将我的ARC项目(非特定文件)转换为非ARC项目,那么我应该如何进行相同的操作呢？

有人请介绍一下同样的问题.

提前致谢.

据我所知,我知道我们可以通过App Groups相同的开发者帐户/证书共享两个应用程序之间的文件.

但我的问题是:我可以Sharing file between different apps through App Groups使用由我自己处理的不同开发者帐户开发的不同应用程序执行相同的操作吗？

在我的应用程序中,我想创建一个分享按钮与WhatsApp,Facebook,Twitter,邮件这样.

这是我的代码

-(IBAction)share:(id)sender
{
NSString *shareText = @"Hi This is a Reward Game App";
NSArray *itemsToShare = @[shareText];
UIActivityViewController *activityVC = [[UIActivityViewController alloc]initWithActivityItems:itemsToShare applicationActivities:nil];
activityVC.excludedActivityTypes = @[UIActivityTypePostToWeibo,UIActivityTypePostToTwitter,UIActivityTypePostToFacebook,UIActivityTypeMail,UIActivityTypeMessage,UIActivityTypeAssignToContact,UIActivityTypePostToTencentWeibo];
[self presentViewController:activityVC animated:YES completion:nil];
}

我正在写这个代码我的模拟器显示这样,

它只显示邮件和Facebook图标,我想要像这样的无聊的whatsup图标消息.

我CoreNFC sample在Xcode 9.0 beta 2中运行代码时遇到此错误并且应用程序崩溃

dyld: Library not loaded: @rpath/CoreNFC.framework/CoreNFC
  Referenced from: /var/containers/Bundle/Application/2837709C-C852-4811-B696-38F2725554D4/iOS-11-by-Examples.app/iOS-11-by-Examples
  Reason: image not found

有谁知道如何解决这个问题？

My widget clock freezes every day at 11:59 mid-night.

below is my TimelineProvider code.

private struct Provider: TimelineProvider {
    func placeholder(in context: Context) -> SimpleEntry {
        SimpleEntry(date: Date())
    }

    func getSnapshot(in context: Context, completion: @escaping (SimpleEntry) -> ()) {
        let entry = SimpleEntry(date: Date())
        completion(entry)
    }

    func getTimeline(in context: Context, completion: @escaping (Timeline<Entry>) -> Void) {
        var entries = [SimpleEntry]()
        let midnight = Calendar.current.startOfDay(for: Date())
        let nextMidnight = Calendar.current.date(byAdding: .day, value: 1, to: midnight)!

        for offset in 0 ..< …

我无法使用RegexKitLite来匹配字符串

NSString *encodedPoints=[apiResponse stringByMatching: @"\\\"([^\\\"]*)\\\"^[^:]*" 
                                              capture: 0];

和apiResponse是:

@"http://maps.google.com/maps?output=dragdir&saddr=20.001364,73.749283&daddr=19.991499,73.744095"

所以,通过这种方式,我得到以下错误:

__NSCFString stringByMatching:capture:]:无法识别的选择器发送到实例0x131fc0

*由于未捕获的异常'NSInvalidArgumentException'终止应用程序,原因:' - [__ NSCFString stringByMatching:capture:]:无法识别的选择器发送到实例0x131fc0'*第一次抛出调用堆栈:(0x3422b8bf 0x3447b1e5 0x3422eacb 0x3422d945 0x34188680 0xb97b 0xad2f 0xaa2d 0xa617 0x34185435 0x375ef9eb 0x376b53cf 0x34185435 0x375ef9eb 0x375ef9a7 0x375ef985 0x375ef6f5 0x375f002d 0x375ee50f 0x375edf01 0x375d44ed 0x375d3d2d 0x30a06df3 0x341ff553 0x341ff4f5 0x341fe343 0x341814dd 0x341813a5 0x30a05fcd 0x37602743 0x4571 0x2838)

我试图通过谷歌搜索找到解决方案,但没有得到确切的解决方案.

请帮忙...

如何才能UIKeyboard在我的应用程序中找到它？

我不想使用任何委托方法UITextField.

请建议任何解决方案.

提前致谢.